Dr. Shubham Aggarwal - Academia.edu (original) (raw)

Papers by Dr. Shubham Aggarwal

Emotional Intelligence for Leadership Effectiveness

2022 IEEE 61st Conference on Decision and Control (CDC)

Evolution of disease in a large population is a function of the top-down policy measures from a c... more Evolution of disease in a large population is a function of the top-down policy measures from a centralized planner, as well as the self-interested decisions (to be socially active) of individual agents in a large heterogeneous population. This paper is concerned with understanding the latter based on a mean-field type optimal control model. Specifically, the model is used to investigate the role of partial information on an agent's decision-making, and study the impact of such decisions by a large number of agents on the spread of the virus in the population. The motivation comes from the presymptomatic and asymptomatic spread of the COVID-19 virus where an agent unwittingly spreads the virus. We show that even in a setting with fully rational agents, limited information on the viral state can result in an epidemic growth.

International Journal of Robust and Nonlinear Control

2022 American Control Conference (ACC)

This paper is concerned with developing meanfield game models for the evolution of epidemics. Spe... more This paper is concerned with developing meanfield game models for the evolution of epidemics. Specifically, an agent's decision-to be socially active in the midst of an epidemic-is modeled as a mean-field game with healthrelated costs and activity-related rewards. By considering the fully and partially observed versions of this problem, the role of information in guiding an agent's rational decision is highlighted. The main contributions of the paper are to derive the equations for the mean-field game in both fully and partially observed settings of the problem, to present a complete analysis of the fully observed case, and to present some analytical results for the partially observed case.

2022 American Control Conference (ACC)

In this paper, we study a large population game with heterogeneous dynamics and cost functions so... more In this paper, we study a large population game with heterogeneous dynamics and cost functions solving a consensus problem. Moreover, the agents have communication constraints which appear as: (1) an Additive-White Gaussian Noise (AWGN) channel, and (2) asynchronous data transmission via a fixed scheduling policy. Since the complexity of solving the game increases with the number of agents, we use the Mean-Field Game paradigm to solve it. Under standard assumptions on the information structure of the agents, we prove that the control of the agent in the MFG setting is free of the dual effect. This allows us to obtain an equilibrium control policy for the generic agent, which is a function of only the local observation of the agent. Furthermore, the equilibrium mean-field trajectory is shown to follow linear dynamics, hence making it computable. We show that in the finite population game, the equilibrium control policy prescribed by the MFG analysis constitutes an −Nash equilibrium, where tends to zero as the number of agents goes to infinity. The paper is concluded with simulations demonstrating the performance of the equilibrium control policy.

Environmental Monitoring and Assessment

2019 International Conference on Range Technology (ICORT)

This work presents a robust LMI tuned PI controller design for the real two degree of freedom (2-... more This work presents a robust LMI tuned PI controller design for the real two degree of freedom (2-DOF) helicopter model with locating poles in a desired region. Experimental results are provided to demonstrate the effectiveness of the proposed design.

IET Control Theory & Applications

Journal of Electronic Imaging

arXiv (Cornell University), Dec 9, 2016

Wythoff's Game is a variation of Nim in which players may take an equal number of stones from eac... more Wythoff's Game is a variation of Nim in which players may take an equal number of stones from each pile or make valid Nim moves. W. A. Wythoff proved that the set of P-Positions (losing position), C, for Wythoff's Game is given by C := (kφ , kφ 2), (kφ 2 , kφ) : k ∈ Z ≥0 [Wyt07]. An open Wythoff problem remains where players make the valid Nim moves or remove kb stones from each pile, where b is a fixed integer. We denote this as the (b, b) game. For example, regular Wythoff's Game is just the (1, 1) game. In 2009, Duchêne and Gravier [DG09] proved an algorithm to generate the set of P-Positions for the (2, 2) game by exploiting the periodic nature of the differences of stones between the two piles modulo 4. We observe similar cyclic behaviour (see definition 3.2) for any b, where b is a power of 2, modulo b 2 , and construct an algorithm to generate the set of P-Positions for this game. Let a be a power of 2. We prove our algorithm works by first showing that it holds for the first a 2 terms in the (a, a) game. Next, we construct an ordered multiset for the (2a, 2a) game from the a 2 terms, and an inductive proof follows. Moreover, we conjecture that all cyclic games require a to be a power of 2, suggesting that there is no similar structure in the generalised (b, b) game where b isn't a power of 2. Future directions for generalising this result would likely utilise numeration systems, particularly the PV numbers. Plotting the P-positions on N 2 with the x-axis and y-axis each representing a single pile of stones produces an interesting pattern. The P-Positions in the original Wythoff Game cluster around lines with slope φ and 1 φ. We generalize this notion to N 3 later, with the z-axis representing a third pile of stones. Definition 1.4. (a, b) represents the state of the game when pile A has a stones and pile B has b stones. Definition 1.5. x(a 1 , b 1) represents the move which changes the state of the game from (a, b) to (a−xa 1 , b− xb 1)

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019

This paper addresses a new technique to cater to the nonlinear dynamics involved in a coupled tan... more This paper addresses a new technique to cater to the nonlinear dynamics involved in a coupled tank system. Earlier approaches to designing a linear controller for a nonlinear system are two-fold. The first considers linearizing the plant around some operating point, thereby ignoring the dynamics posed by higher-order terms while the second approach is to represent the system nonlinearities in the form of model uncertainties, without any approximation of the higher order terms. The latter method forms the basis of design considered in this paper. The nonlinear model of a coupled tank system is represented in the form of a polytopic system that allows for the implementation of a linear controller. The variation in nonlinear term is treated as an uncertain parameter for the system representation. A R∞ based Proportional Integral (PI) controller is designed combined with pole placement in a desired Linear Matrix Inequality (LMI) region to ensure better transient behavior of the system. Experimental results have been provided and compared with conventional design to illustrate the efficacy of the proposed design method.

It's finally here! 🎉 The long-awaited v0.10 release comes with a lot of improvements whi... more It's finally here! 🎉 The long-awaited v0.10 release comes with a lot of improvements which you can read about in the changelog below. There will also be more about it the upcoming development update on the forum, so keep an eye out on our Twitter and join our Discord server. <strong>New to ActivityWatch?</strong> Check out the website and the README. Installation See the getting started guide in the documentation. Downloads <strong>Windows</strong> (.exe, installer) <strong>macOS</strong> (.dmg) <strong>Linux</strong> (.zip) Honorary mentions Johan Bjäreholt (@johan-bjareholt) for his tireless work on aw-server-rust. Kerkko Peltari (@xylix) for his amazing work on improving macOS support (among many other things). Bill Ang Li (@billangli) for his amazing work on adding an update check to the web UI, and a user engagement poll after a week of use. FUUG.fi (Finnish Unix Users Group) for contributing with a €3,000 grant earlier t...

Lecture Notes in Civil Engineering, 2021

As recurrence and the impact of some weather events are increasing, therefore it needs to tackle ... more As recurrence and the impact of some weather events are increasing, therefore it needs to tackle such events is the concern. Climate change is one of the factors causing such increase in magnitude and frequency of extreme weather events. Weather forecasting system can help in managing such events. Daily weather forecasting and monitoring promote resource management and disaster preparedness. This research focused on the daily weather conditions of cities of different countries like Shanghai, Manila, Tokyo, Kolkata and Mexico. Weather conditions of these cities were monitored and recorded from different weather forecasting Web sites daily. Based on this recorded data, an improved weather forecasting model can be developed through statistical analysis of temperature, wind speed, quantitative precipitation of extreme weather events happened among these cities in recent decades. Using Minitab statistical software, the accurate weather providing Web site was analyzed. The deviation of these readings helped in analyzing how accurate is the reading provided by the weather forecasting Web sites concerning the calculated mean of the readings.

2020 IEEE International Conference on Industrial Technology (ICIT), 2020

This paper presents a new approach to deal with the nonlinear dynamics present in a Twin Rotor MI... more This paper presents a new approach to deal with the nonlinear dynamics present in a Twin Rotor MIMO System (TRMS) without any approximation of the system model. Conventionally, there are two approaches/options for adopting linear control design methods for a nonlinear system. The first one is to linearize the model around an operating point, neglecting the higher order dynamics. This could result in drastic changes in the transient behavior of the model for which the controller fails to ensure robustness and a good tracking response. The second approach is to consider the exact model and represent the nonlinear terms involved, in the form of structural or model uncertainties. The design technique adopted in this paper is based on the second approach. The nonlinear model of TRMS is represented in the form of a linear parameter-varying system, thereby facilitating the design of a linear robust controller, with a better tracking control of the desired states. Additionally, a robust Linear Matrix Inequality (LMI) based decentralized Proportional Integral (PI) controller is designed along with locating closed-loop poles in a desired region. A comparative study is done for experimental results of various existing designs and the proposed method.

2017 IEEE International Conference on Power, Control, Signals and Instrumentation Engineering (ICPCSI), 2017

The LOS stabilization control based on gyroscopic stabilized staging is required to disengage the... more The LOS stabilization control based on gyroscopic stabilized staging is required to disengage the line of sight from the movement and jitter in the carrier and also ensure smooth tracking of target in electro-optical tracking systems. This paper presents a detailed comparison of linear controllers and an intelligent controller (Lead-Lag, Proportional-Integral-Derivative (PID) and Fuzzy Logic controller) for the above mentioned system. The overall control systems have been simulated using MATLAB/Simulink.

Journal of emerging technologies and innovative research, 2019

In present scenario, Environmental issues are seen worldwide. These issues are very crucial which... more In present scenario, Environmental issues are seen worldwide. These issues are very crucial which includes; global warming, waste disposal, climate change, and pollution which influence daily lifestyle of not only people, but these micro-factors have indirect impact on the business environment of the companies too. Due to which many top corporates still hesitate to use green practices even after government compulsion. But some of the reputed companies such as Oil and Natural Gas Corporation Ltd., Samsung, Suzlon Energy, Wipro Info tech have started molding their traditional business practices towards E-practices in their processes which helps in implementation of cost-benefit analysis, reducing cost and increasing efficiency through optimum utilization of resources. As quoted by McCarthy, traditionally marketing revolved around 4P's-Product, Price, Place, and Promotion but in the emerging revolutionary phase of today's Green Marketing scenario it is focused on three crucial P's-People, Profit and Planet. Thus, our approach will be focused on collaborating the traditional and green marketing practices and develop combined 7P's of green marketing.

2021 Asian Conference on Innovation in Technology (ASIANCON), 2021

In this paper Linear Regression algorithm has been used to optimize the side length of monopole a... more In this paper Linear Regression algorithm has been used to optimize the side length of monopole antenna designed for use in Wireless Local Area Network. The aim of this paper is to use Machine learning to find the optimum dimension of the antenna for minimum return loss. The dataset obtained from simulation was trained using a one to one strategy that is one label for one feature and this was looped so as to cover the entire dataset. The data was tested on various machine learning algorithms such as linear regression, lasso algorithms, but due to limitation of data size and computational factors the linear regression algorithm worked out the best. The algorithm is implemented in python and agrees with the simulated result.

International Journal of Control, 2021

This paper presents a robust L2 based Static Output Feedback (SOF) controller design for a class ... more This paper presents a robust L2 based Static Output Feedback (SOF) controller design for a class of linear continuous-time polytopic systems subject to actuator saturation, which is a feature commo...

Emotional Intelligence for Leadership Effectiveness

2022 IEEE 61st Conference on Decision and Control (CDC)

Evolution of disease in a large population is a function of the top-down policy measures from a c... more Evolution of disease in a large population is a function of the top-down policy measures from a centralized planner, as well as the self-interested decisions (to be socially active) of individual agents in a large heterogeneous population. This paper is concerned with understanding the latter based on a mean-field type optimal control model. Specifically, the model is used to investigate the role of partial information on an agent's decision-making, and study the impact of such decisions by a large number of agents on the spread of the virus in the population. The motivation comes from the presymptomatic and asymptomatic spread of the COVID-19 virus where an agent unwittingly spreads the virus. We show that even in a setting with fully rational agents, limited information on the viral state can result in an epidemic growth.

International Journal of Robust and Nonlinear Control

2022 American Control Conference (ACC)

This paper is concerned with developing meanfield game models for the evolution of epidemics. Spe... more This paper is concerned with developing meanfield game models for the evolution of epidemics. Specifically, an agent's decision-to be socially active in the midst of an epidemic-is modeled as a mean-field game with healthrelated costs and activity-related rewards. By considering the fully and partially observed versions of this problem, the role of information in guiding an agent's rational decision is highlighted. The main contributions of the paper are to derive the equations for the mean-field game in both fully and partially observed settings of the problem, to present a complete analysis of the fully observed case, and to present some analytical results for the partially observed case.

2022 American Control Conference (ACC)

In this paper, we study a large population game with heterogeneous dynamics and cost functions so... more In this paper, we study a large population game with heterogeneous dynamics and cost functions solving a consensus problem. Moreover, the agents have communication constraints which appear as: (1) an Additive-White Gaussian Noise (AWGN) channel, and (2) asynchronous data transmission via a fixed scheduling policy. Since the complexity of solving the game increases with the number of agents, we use the Mean-Field Game paradigm to solve it. Under standard assumptions on the information structure of the agents, we prove that the control of the agent in the MFG setting is free of the dual effect. This allows us to obtain an equilibrium control policy for the generic agent, which is a function of only the local observation of the agent. Furthermore, the equilibrium mean-field trajectory is shown to follow linear dynamics, hence making it computable. We show that in the finite population game, the equilibrium control policy prescribed by the MFG analysis constitutes an −Nash equilibrium, where tends to zero as the number of agents goes to infinity. The paper is concluded with simulations demonstrating the performance of the equilibrium control policy.

Environmental Monitoring and Assessment

2019 International Conference on Range Technology (ICORT)

This work presents a robust LMI tuned PI controller design for the real two degree of freedom (2-... more This work presents a robust LMI tuned PI controller design for the real two degree of freedom (2-DOF) helicopter model with locating poles in a desired region. Experimental results are provided to demonstrate the effectiveness of the proposed design.

IET Control Theory & Applications

Journal of Electronic Imaging

arXiv (Cornell University), Dec 9, 2016

Wythoff's Game is a variation of Nim in which players may take an equal number of stones from eac... more Wythoff's Game is a variation of Nim in which players may take an equal number of stones from each pile or make valid Nim moves. W. A. Wythoff proved that the set of P-Positions (losing position), C, for Wythoff's Game is given by C := (kφ , kφ 2), (kφ 2 , kφ) : k ∈ Z ≥0 [Wyt07]. An open Wythoff problem remains where players make the valid Nim moves or remove kb stones from each pile, where b is a fixed integer. We denote this as the (b, b) game. For example, regular Wythoff's Game is just the (1, 1) game. In 2009, Duchêne and Gravier [DG09] proved an algorithm to generate the set of P-Positions for the (2, 2) game by exploiting the periodic nature of the differences of stones between the two piles modulo 4. We observe similar cyclic behaviour (see definition 3.2) for any b, where b is a power of 2, modulo b 2 , and construct an algorithm to generate the set of P-Positions for this game. Let a be a power of 2. We prove our algorithm works by first showing that it holds for the first a 2 terms in the (a, a) game. Next, we construct an ordered multiset for the (2a, 2a) game from the a 2 terms, and an inductive proof follows. Moreover, we conjecture that all cyclic games require a to be a power of 2, suggesting that there is no similar structure in the generalised (b, b) game where b isn't a power of 2. Future directions for generalising this result would likely utilise numeration systems, particularly the PV numbers. Plotting the P-positions on N 2 with the x-axis and y-axis each representing a single pile of stones produces an interesting pattern. The P-Positions in the original Wythoff Game cluster around lines with slope φ and 1 φ. We generalize this notion to N 3 later, with the z-axis representing a third pile of stones. Definition 1.4. (a, b) represents the state of the game when pile A has a stones and pile B has b stones. Definition 1.5. x(a 1 , b 1) represents the move which changes the state of the game from (a, b) to (a−xa 1 , b− xb 1)

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019

This paper addresses a new technique to cater to the nonlinear dynamics involved in a coupled tan... more This paper addresses a new technique to cater to the nonlinear dynamics involved in a coupled tank system. Earlier approaches to designing a linear controller for a nonlinear system are two-fold. The first considers linearizing the plant around some operating point, thereby ignoring the dynamics posed by higher-order terms while the second approach is to represent the system nonlinearities in the form of model uncertainties, without any approximation of the higher order terms. The latter method forms the basis of design considered in this paper. The nonlinear model of a coupled tank system is represented in the form of a polytopic system that allows for the implementation of a linear controller. The variation in nonlinear term is treated as an uncertain parameter for the system representation. A R∞ based Proportional Integral (PI) controller is designed combined with pole placement in a desired Linear Matrix Inequality (LMI) region to ensure better transient behavior of the system. Experimental results have been provided and compared with conventional design to illustrate the efficacy of the proposed design method.

It's finally here! 🎉 The long-awaited v0.10 release comes with a lot of improvements whi... more It's finally here! 🎉 The long-awaited v0.10 release comes with a lot of improvements which you can read about in the changelog below. There will also be more about it the upcoming development update on the forum, so keep an eye out on our Twitter and join our Discord server. <strong>New to ActivityWatch?</strong> Check out the website and the README. Installation See the getting started guide in the documentation. Downloads <strong>Windows</strong> (.exe, installer) <strong>macOS</strong> (.dmg) <strong>Linux</strong> (.zip) Honorary mentions Johan Bjäreholt (@johan-bjareholt) for his tireless work on aw-server-rust. Kerkko Peltari (@xylix) for his amazing work on improving macOS support (among many other things). Bill Ang Li (@billangli) for his amazing work on adding an update check to the web UI, and a user engagement poll after a week of use. FUUG.fi (Finnish Unix Users Group) for contributing with a €3,000 grant earlier t...

Lecture Notes in Civil Engineering, 2021

As recurrence and the impact of some weather events are increasing, therefore it needs to tackle ... more As recurrence and the impact of some weather events are increasing, therefore it needs to tackle such events is the concern. Climate change is one of the factors causing such increase in magnitude and frequency of extreme weather events. Weather forecasting system can help in managing such events. Daily weather forecasting and monitoring promote resource management and disaster preparedness. This research focused on the daily weather conditions of cities of different countries like Shanghai, Manila, Tokyo, Kolkata and Mexico. Weather conditions of these cities were monitored and recorded from different weather forecasting Web sites daily. Based on this recorded data, an improved weather forecasting model can be developed through statistical analysis of temperature, wind speed, quantitative precipitation of extreme weather events happened among these cities in recent decades. Using Minitab statistical software, the accurate weather providing Web site was analyzed. The deviation of these readings helped in analyzing how accurate is the reading provided by the weather forecasting Web sites concerning the calculated mean of the readings.

2020 IEEE International Conference on Industrial Technology (ICIT), 2020

This paper presents a new approach to deal with the nonlinear dynamics present in a Twin Rotor MI... more This paper presents a new approach to deal with the nonlinear dynamics present in a Twin Rotor MIMO System (TRMS) without any approximation of the system model. Conventionally, there are two approaches/options for adopting linear control design methods for a nonlinear system. The first one is to linearize the model around an operating point, neglecting the higher order dynamics. This could result in drastic changes in the transient behavior of the model for which the controller fails to ensure robustness and a good tracking response. The second approach is to consider the exact model and represent the nonlinear terms involved, in the form of structural or model uncertainties. The design technique adopted in this paper is based on the second approach. The nonlinear model of TRMS is represented in the form of a linear parameter-varying system, thereby facilitating the design of a linear robust controller, with a better tracking control of the desired states. Additionally, a robust Linear Matrix Inequality (LMI) based decentralized Proportional Integral (PI) controller is designed along with locating closed-loop poles in a desired region. A comparative study is done for experimental results of various existing designs and the proposed method.

2017 IEEE International Conference on Power, Control, Signals and Instrumentation Engineering (ICPCSI), 2017

The LOS stabilization control based on gyroscopic stabilized staging is required to disengage the... more The LOS stabilization control based on gyroscopic stabilized staging is required to disengage the line of sight from the movement and jitter in the carrier and also ensure smooth tracking of target in electro-optical tracking systems. This paper presents a detailed comparison of linear controllers and an intelligent controller (Lead-Lag, Proportional-Integral-Derivative (PID) and Fuzzy Logic controller) for the above mentioned system. The overall control systems have been simulated using MATLAB/Simulink.

Journal of emerging technologies and innovative research, 2019

In present scenario, Environmental issues are seen worldwide. These issues are very crucial which... more In present scenario, Environmental issues are seen worldwide. These issues are very crucial which includes; global warming, waste disposal, climate change, and pollution which influence daily lifestyle of not only people, but these micro-factors have indirect impact on the business environment of the companies too. Due to which many top corporates still hesitate to use green practices even after government compulsion. But some of the reputed companies such as Oil and Natural Gas Corporation Ltd., Samsung, Suzlon Energy, Wipro Info tech have started molding their traditional business practices towards E-practices in their processes which helps in implementation of cost-benefit analysis, reducing cost and increasing efficiency through optimum utilization of resources. As quoted by McCarthy, traditionally marketing revolved around 4P's-Product, Price, Place, and Promotion but in the emerging revolutionary phase of today's Green Marketing scenario it is focused on three crucial P's-People, Profit and Planet. Thus, our approach will be focused on collaborating the traditional and green marketing practices and develop combined 7P's of green marketing.

2021 Asian Conference on Innovation in Technology (ASIANCON), 2021

In this paper Linear Regression algorithm has been used to optimize the side length of monopole a... more In this paper Linear Regression algorithm has been used to optimize the side length of monopole antenna designed for use in Wireless Local Area Network. The aim of this paper is to use Machine learning to find the optimum dimension of the antenna for minimum return loss. The dataset obtained from simulation was trained using a one to one strategy that is one label for one feature and this was looped so as to cover the entire dataset. The data was tested on various machine learning algorithms such as linear regression, lasso algorithms, but due to limitation of data size and computational factors the linear regression algorithm worked out the best. The algorithm is implemented in python and agrees with the simulated result.

International Journal of Control, 2021

This paper presents a robust L2 based Static Output Feedback (SOF) controller design for a class ... more This paper presents a robust L2 based Static Output Feedback (SOF) controller design for a class of linear continuous-time polytopic systems subject to actuator saturation, which is a feature commo...